558 
Nematoda: 
Ancylostoma? [Dubini, 1843a,5—13] emendation Creplin, 1845 a, 325, type duodenale 
(in Homo; Italy). 
Ascaris Linnaeus, 1758 a, 644, 648, type lumbricoides (in Homo; Europe). 
Dracunculus ‘‘Kniphof, 1759, 12” [not verified]; Gallandat, 1773 a, 103—116, type 
medinensis (in Homo). 
Gnathostoma Owen, 1836 f, 123—126, type spinigerum (in Felis tigris; London). 
Necator Stiles, 1903 y, 312, type americanus (in Homo; U.S.A.). 
Strongyloides Grassi, 1879f, 497, type intestinalis = stercoralis (in Homo). 
Trichostrongylus Looss, 19050, 413—417, type retortaeformis (in Lepus timidus; 
Europe). 
Gordiacea: 
Gordius Linnaeus, 1758a, 644, 647, type aquaticus (free; Europe). 
Paragordius Camerano, 1897 g, 368, 399—402, type varius (free; U.S.A.). 
Acanthocephala: 
Gigantorhynchus Hamann, 1892 d, 196, type echinodiscus (in Myrmecophaga jubata, 
M. bivittata; Brasil). 
10) The undersigned Secretary presents the following generic 
names for definite rejection from the ‘‘Official List”, on the ground 
that they are preoccupied. (See Art. 34.) 
Trematoda: 
Acanthocephala Dies., 1858, not Laporte, 1832. 
Acrodactyla Staff., 1904, not Hal., ante 1846. 
Anadasmus Looss, 1899, not Walsingham, 1897. 
Anisogaster Looss, 1901, not Deyr, 1863. 
Astia Looss, 1899, not K och, 1879. 
Baris Looss, 1899, not Germ., 1817. 
Brachymetra Stoss., 1904, not Mayr, 1865. 
Creadium, Looss, 1899, not Vieill., 1816. 
Crossodera Duj., 1845, not Gould, 1837. 
Eurycoelum Brock, 1886, not Chaudoir, 1848. 
Eurysoma Duj., 1845, not Gistl., 1829. 
Leioderma Staff., 1904, not Will.-Suhm, 1873. 
Leptalea Looss, 1899, not Klug, 1839. 
Leptosoma Staff., 1904, not Leach, 1819. 
Levinsenia Stoss., 1899, not Mesnil, 1897. 
Macraspis Olss., 1868 or 1869, not McL., ante 1835. 
Megacetes Looss, 1899, not Thomas, 1859. 
Microscapha Looss, 1899, not LeConte, 1866. 
Polyorchis Stoss., 1892, not Agassiz, 1862. 
Polysarcus Looss, 1899, not Fieb., 1853. 
Spathidium Looss, 1899, not Duj., 1841. 
Stomylus Looss, 1899, not Fahraeus, 1871. 
Nematoda:: 
Acanthophorus Linst., 1876, not Serv., 1832. 
Acanthosoma Mayer, 1844, not Curt., 1824. 
2 See Art. 19, and Opinions 26, 27, 34 and 36. 
3 This list contains a few names of organisms which are not Nematoda, but 
which have been classified as such at one time or another. 
